Abstract

A high efficiency LCD employing a color-matching backlight system that consists of a collimation lenticular lens sheet, a blazed grating, and a focusing lenticular lens array is proposed and analyzed. The RGB lights that are collimated and dispersed from the collimation lenticular lens sheet and the blazed grating are incident on the RGB color filters by the focusing lenticular lens array. The color-matched transmittance was increased 183% and 121% for divergence angles of 2° and 11°, respectively, compared to a conventional backlight that does not use a blazed grating. The design, simulation, and experimental results for the prototype color-matching backlight system are presented.

Figures (7)

Schematic structure of the spectral backlight system with the collimation lenticular lens sheet, the blazed grating, and the focusing lenticular lens array, which are placed on top of the conventional LGP. LGP, light guide panel; LC, liquid crystal; CF, color filter.